Why is a square root called a squared root

2 answers:

7 0

In the 9th century, Arab writers usually called one of the equal factors of a number jadhr (“root”), and their medieval European translator used the Latin word radix (from which derives the adjective radical). Radix is the Latin for root, and radical is the name of the square root symbol.

Akimi4 [234]3 years ago

6 0

It is called a square root because you are having to find a number that is multiplied by itself to get the number that is intended. Let's you have to find the square root of 16. It would of course be 4 because 4*4 is 16. So in this case it could also be written as 4 to the second power. Hope this helped. :)

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Let a = 3 – 5i and b = –1 + 7i. Which of the following are true statements? Check all that apply.

Alona [7]

Answer: 2nd and 6th options are correct

Step-by-step explanation: It showed me after I got em wrong

7 0

3 years ago

A College Alcohol Study has interviewed random samples of students at four-year colleges. In the most recent study, 494 of 1000

Vinil7 [7]

Answer:

The 95% confidence interval for the difference between the proportion of women who drink alcohol and the proportion of men who drink alcohol is (-0.102, -0.014) or (-10.2%, -1.4%).

Step-by-step explanation:

We want to calculate the bounds of a 95% confidence interval of the difference between proportions.

For a 95% CI, the critical value for z is z=1.96.

The sample 1 (women), of size n1=1000 has a proportion of p1=0.494.

$p_1=X_1/n_1=494/1000=0.494$

The sample 2 (men), of size n2=1000 has a proportion of p2=0.552.

$p_2=X_2/n_2=552/1000=0.552$

The difference between proportions is (p1-p2)=-0.058.

$p_d=p_1-p_2=0.494-0.552=-0.058$

The pooled proportion, needed to calculate the standard error, is:

$p=\dfrac{X_1+X_2}{n_1+n_2}=\dfrac{494+552}{1000+1000}=\dfrac{1046}{2000}=0.523$

The estimated standard error of the difference between means is computed using the formula:

$s_{p1-p2}=\sqrt{\dfrac{p(1-p)}{n_1}+\dfrac{p(1-p)}{n_2}}=\sqrt{\dfrac{0.523*0.477}{1000}+\dfrac{0.523*0.477}{1000}}\\\\\\s_{p1-p2}=\sqrt{0.000249+0.000249}=\sqrt{0.000499}=0.022$